Chaos Computer Club - recent events feed (low quality)

We have spend the last years making our own mate ice tea, called HolyMate. We want to share our experiences making a lot of ice tea on a 'small' scale (700+ litre), and explain the process. Hopefully this will inspire you to try it out for yourself, and make your own mate ice tea. Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://program.why2025.or...

In 2017 I presented on DNA: The code of life. Since then there have been many new developments, and I've learned how to explain the matter better. I am submitting two talks this year, and this short one is 1) fun on its own and 2) helps you appreciate the other talk ('reverse engineering the whole source code of a bacterium') more DNA is the code of life. Surprisingly, it is easier to understand D...

In a context of technological integration, OT is getting more and more a green field for attackers and illegal activities. This phenomena is the natural result of the absence of mutual understanding and collaboration between IT and OT sectors that looking one each other as a totally unrelated entities. In this talk we'll explore some OT technologies trying to understand and highlight some of the m...

Open source has revolutioned so many parts of our lives, why hasn't the same happened in healthcare? This talk will showcase examples from both hardware and software (e-NABLE prothestics, OpenAPS, Nightscout, and more), explore the regulatory hurdles that are holding these and other projects back, then shift to looking at the future and charting a path for these projects. Join us to build a more t...

Have you ever thought that Mathematics is a boring science about multiplying matrices, calculating integrals and approximating functions? Well, you've been wrong. Mathematics is much bigger than that and in this talk we are going to look at one of the foundational object in Topology - a manifold. And, most importantly, we won't need any formulas or calculations to introduce it. (No prior knowledge...

The SOHO Smashup is a famous category in the IoT focused edition of Pwn2Own. Contestants are challenged to exploit a router from the WAN side and then use that device to exploit a second device on the internal LAN. Last year, we took them up on this challenge and successfully demonstrated a 0day exploit chain against a QNAP router and pivoting to a TrueNAS system. In this presentation, we'll descr...

Let's talk to people about negotiating consent before engaging in personal and physical interactions. Your browser does it with every web server, so why shouldn't you do the same with people? This sounds harder than it actually is. Using the HTTP protocol as a guide this I will talk you through how you could negotiate consent to engage with someone on a variety of levels: From 'GET Hug' all the wa...

Old technology is amazing! Have a look at an old electromechanical Pinball Machine, and try to understand how this works, without any (digital) electronics. Find out these machines have much in common with modern computers. Step by step it becomes clear how an old (1973) Pinball machine is "programmed". A 1973 electromechanical Pinball Machine is an amazing machine. But how does this work without...

What is up with the beings with the visors going 'beep boop, this one is not a person'? Unit Δ-44203 explains how it built an electronic face, why it did so and what consequences it experienced in a world where everyone is supposed to show an identifiable face all the time. Warning: this talk may be cognitohazardous and end up causing shifts in self-identity. — Can I see your face? — You are looki...

If you want to try something new, unusual, and technically creative, try high-altitude ballooning! In this short presentation, I'll share my experiences from a series of three high-altitude balloon projects. These projects included launching sensor payloads to altitudes about 25km and live HD video transmission from the stratosphere. You will learn how to prepare your payload, how to track its pos...

Let's learn about L2 isolation with VLANs and dive into basic network architecture with OPNsense. After playing a bit with IPv4, let's discuss unicorn-issues IPv6 for your homelab-ing. Then expanding with WireGuard for simple inter-machine networks. Finally, we will take a look into a fail of my own via "security"(-by-obscurity) and a few words of how to defend against it. This talk will discuss t...

Welcome at WHY2025! A warm welcome by Nancy and Boekenwuurm, to wish you the best WHY2025 and give a quick intro! Licensed to the public under https://creativecommons.org/licenses/by/4.0/ about this event: https://program.why2025.org/why2025/talk/BAU8GH/

Are you a smartphone user worried about spyware, advanced actors, backdoors, zero-days or side-channel attacks? These routinely bypass end-to-end encryption through keyloggers, screen capture and compromised keys. Smartphones are part of complex ecosystems with dozens of hardware and software components and remain vulnerable despite vendor and political efforts. We introduce a simple, offline, air...

This talk will take you into a journey leading to the retrofit of a robotic tape library to enable it to accomodate hard drives in addition to the original media, from the reasons we did it to all the obstacles that needed to be overcome and how we did all that, pushing a little further the physical limits that make data storage increasingly problematic in a world where over 200TB is generated eve...

When presenting for a larger audience or when a presentation is recorded it is almost a given that a microphone is used. In this presentation we will show you common problems presenters have with microphones, we will give you tips on holding a hand microphone and show common problems with headsets. All this to give you tools to improve the audio quality of your presentation at the source which can...

Zodra een presentatie gehouden wordt voor een groter publiek of wanneer een presentatie opgenomen wordt is het bijna een gegeven dat een microfoon gebruikt wordt. In deze presentatie laten we jullie zien welke problemen presentators hebben met microfoons, we geven tips hoe een hand microfoon vast gehouden hoort te worden en laten veel voorkomende problemen met hoofdmicrofoons zien. We geven je han...

In the realm of cybersecurity, workplaces can be surprisingly unsafe, with a higher turnover of CISOs and alarming rates of misconduct. This talk explores the mechanisms behind this paradox, examining organizational dynamics, the pressures on CISOs, and the emergence of toxic behaviors. By analyzing real-world some very personal examples, we will uncover the root causes of these issues and provide...

As of August 1st, 2025, the EU’s Radio Equipment Directive enforces new cybersecurity requirements. For the first time, broad categories of everyday devices , not just critical infrastructure or niche tech, must meet mandatory security standards. This talk breaks down how we got here, why it matters, and what’s breaking in the process. We’ll look at the political and technical hurdles in rolling t...

What could be more fun than gaining control over your dreamworld? Go to sleep, and find yourself doing things that would be impossible in the real world. Flying? No problem! You can be superman and have it feel more real than reality. Now if that's not a fun hacking project.. You can hack all sorts of things. Software, hardware. But being a hacker, what makes more sense than to hack oneself? Hacke...

This talk is a roller-coaster ride through a few years of experience in teaching the government about their obligations w.r.t. climate change. It details the procedural hacks they use, and ways to evade them. It also gives examples of elegantly designed cases with a potential of very high impact. Climate law is a domain of logic, language and social ethics, all available in the average hacker's to...

Generative Art is a form of art where the artist build a machine that autonomously produces artworks. In this talk I'll introduce you to the wonderful world of computer generated art. Through live demo's and fiddling, you'll learn how you too can be an artist. I'll show plenty of examples using open source tools on how generative art can be an alternative path to learn to code. Because sometimes,...

Let's dive deep into the threat detection engineering topic and how does the detection engineer's job looks like in 2025. I work with threat researchers, detection engineering, and engineering managers, and we'll talk about it all: from query languages to tuning, from managing detections as code to content management, from maturity of processes to human skills augmentation. This talk provides a co...

Frank talks about AI, why it all of a sudden is everywhere and what it means. The keynotes of the likes of Microsoft, Google and Apple can all be summarized in 10 words: “A.I., A.I., A.I., Large Language Model, A.I., A.I., GPT, A.I. …“, so no doubt artificial intelligence holds a promise for the future. But what promise? Will A.I. save use or doom us? Or is it too soon to tell? With the invention...

Zusammenfassung: Digitalität und Mündigkeit Der Vortrag thematisiert die zunehmende gesellschaftliche Anfälligkeit für Desinformation und autoritäre Denkstile in einer digital gestressten Zeit. In einem Klima permanenter Krisen wächst der Ruf nach Kontrolle und Zensur – oft im Namen der Demokratie. Doch diese Entwicklungen stehen im Widerspruch zum emanzipatorischen Versprechen des Internets: glei...

Wie können wir Daten schützen und für de Zukunft zugänglich machen und erhalten, wenn sich das Internet immer mehr in den Besitz von einzelnen Konzernen konsolidiert? Ein kleiner Talk mit Diskussion zur Theorie und Praxis von Websitenarchivierung und digitaler Langlebigkeit. Das Internet ist schon lange nicht mehr ein Ort, wo Information einfach nur festgehalten und empfangbar gemacht wird. Spätes...